Bob Cooke, TSTA (Great Britain). Bob Cooke is director of Institute for Psychotherapy in Manchester. He is Teaching and Supervising Transactional Analyst (TSTA) and director of training programmes in psychotherapy, counseling and coaching.

PhD Richard Erskine, TSTA (USA).
Clinical Psychologist. Director of Institute for Integrative Psychotherapy, New York. President of International Integrative Psychotherapy Association. Teaching and Supervising Transactional Analyst. He is author and coauthor of many books from integrative psychotherapy: Integrative Psychotherapy in Action (1988), Theories and Methods of an Integrative Transactional Analysis (1997), Beyond Empathy – A Therapy of Contact-in-Relationship (1999) in Integrative Psychotherapy: The Art and Science of Relationship (2004). One of the founders of Integrative Psychotherapy.

Geoff Hopping, TSTA (Velika Britanija). Geoff Hopping lives in London and is Teaching and Sueprvising Transactional Analyst (TSTA). He is coordinator of training in TA counseling course at Institute Metanoia.

Msc. Gudrun Stummer, PTSTA (Great Britain)
Integrative psychotherapist and director of Center for Integrative Psychotherapy in Manchester. She is Provisional Teaching and Supervising Transactional Analyst. Author of articles about theory of motivation in integrative psychotheraopy and therapeutic contratcs.